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[CRYPTO] tcrypt: Add aead support
Add AEAD support to tcrypt, needed by GCM. Signed-off-by: Mikko Herranen <mh1@iki.fi> Reviewed-by: Mika Kukkonen <mika.kukkonen@nsn.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Mikko Herranen
Herbert Xu
parent
ff85a8082f
commit
e3a4ea4fd2
2 changed files with 271 additions and 9 deletions
258
crypto/tcrypt.c
258
crypto/tcrypt.c
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@ -6,12 +6,14 @@
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*
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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* Copyright (c) 2002 Jean-Francois Dive <jef@linuxbe.org>
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* Copyright (c) 2007 Nokia Siemens Networks
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* 2007-11-13 Added AEAD support
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* 2007-11-06 Added SHA-224 and SHA-224-HMAC tests
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* 2006-12-07 Added SHA384 HMAC and SHA512 HMAC tests
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* 2004-08-09 Added cipher speed tests (Reyk Floeter <reyk@vantronix.net>)
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@ -72,6 +74,7 @@ static unsigned int sec;
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static int mode;
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static char *xbuf;
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static char *axbuf;
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static char *tvmem;
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static char *check[] = {
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@ -169,6 +172,7 @@ static void test_hash(char *algo, struct hash_testvec *template,
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/* setup the dummy buffer first */
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memset(xbuf, 0, XBUFSIZE);
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memset(axbuf, 0, XBUFSIZE);
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j = 0;
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for (i = 0; i < tcount; i++) {
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@ -217,6 +221,233 @@ out:
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crypto_free_hash(tfm);
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}
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static void test_aead(char *algo, int enc, struct aead_testvec *template,
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unsigned int tcount)
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{
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unsigned int ret, i, j, k, temp;
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unsigned int tsize;
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char *q;
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struct crypto_aead *tfm;
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char *key;
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struct aead_testvec *aead_tv;
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struct aead_request *req;
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struct scatterlist sg[8];
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struct scatterlist asg[8];
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const char *e;
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struct tcrypt_result result;
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if (enc == ENCRYPT)
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e = "encryption";
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else
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e = "decryption";
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printk(KERN_INFO "\ntesting %s %s\n", algo, e);
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tsize = sizeof(struct aead_testvec);
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tsize *= tcount;
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if (tsize > TVMEMSIZE) {
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printk(KERN_INFO "template (%u) too big for tvmem (%u)\n",
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tsize, TVMEMSIZE);
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return;
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}
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memcpy(tvmem, template, tsize);
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aead_tv = (void *)tvmem;
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init_completion(&result.completion);
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tfm = crypto_alloc_aead(algo, 0, 0);
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if (IS_ERR(tfm)) {
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printk(KERN_INFO "failed to load transform for %s: %ld\n",
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algo, PTR_ERR(tfm));
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return;
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}
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req = aead_request_alloc(tfm, GFP_KERNEL);
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if (!req) {
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printk(KERN_INFO "failed to allocate request for %s\n", algo);
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goto out;
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}
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aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
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tcrypt_complete, &result);
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for (i = 0, j = 0; i < tcount; i++) {
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if (!aead_tv[i].np) {
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printk(KERN_INFO "test %u (%d bit key):\n",
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++j, aead_tv[i].klen * 8);
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crypto_aead_clear_flags(tfm, ~0);
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if (aead_tv[i].wk)
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crypto_aead_set_flags(
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tfm, CRYPTO_TFM_REQ_WEAK_KEY);
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key = aead_tv[i].key;
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ret = crypto_aead_setkey(tfm, key,
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aead_tv[i].klen);
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if (ret) {
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printk(KERN_INFO "setkey() failed flags=%x\n",
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crypto_aead_get_flags(tfm));
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if (!aead_tv[i].fail)
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goto out;
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}
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sg_init_one(&sg[0], aead_tv[i].input,
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aead_tv[i].ilen);
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sg_init_one(&asg[0], aead_tv[i].assoc,
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aead_tv[i].alen);
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aead_request_set_crypt(req, sg, sg,
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aead_tv[i].ilen,
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aead_tv[i].iv);
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aead_request_set_assoc(req, asg, aead_tv[i].alen);
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if (enc) {
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ret = crypto_aead_encrypt(req);
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} else {
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memcpy(req->__ctx, aead_tv[i].tag,
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aead_tv[i].tlen);
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ret = crypto_aead_decrypt(req);
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}
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switch (ret) {
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case 0:
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break;
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case -EINPROGRESS:
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case -EBUSY:
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ret = wait_for_completion_interruptible(
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&result.completion);
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if (!ret && !(ret = result.err)) {
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INIT_COMPLETION(result.completion);
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break;
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}
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/* fall through */
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default:
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printk(KERN_INFO "%s () failed err=%d\n",
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e, -ret);
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goto out;
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}
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q = kmap(sg_page(&sg[0])) + sg[0].offset;
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hexdump(q, aead_tv[i].rlen);
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printk(KERN_INFO "auth tag: ");
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hexdump((unsigned char *)req->__ctx, aead_tv[i].tlen);
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printk(KERN_INFO "enc/dec: %s\n",
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memcmp(q, aead_tv[i].result,
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aead_tv[i].rlen) ? "fail" : "pass");
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printk(KERN_INFO "auth tag: %s\n",
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memcmp(req->__ctx, aead_tv[i].tag,
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aead_tv[i].tlen) ? "fail" : "pass");
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}
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}
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printk(KERN_INFO "\ntesting %s %s across pages (chunking)\n", algo, e);
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memset(xbuf, 0, XBUFSIZE);
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for (i = 0, j = 0; i < tcount; i++) {
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if (aead_tv[i].np) {
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printk(KERN_INFO "test %u (%d bit key):\n",
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++j, aead_tv[i].klen * 8);
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crypto_aead_clear_flags(tfm, ~0);
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if (aead_tv[i].wk)
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crypto_aead_set_flags(
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tfm, CRYPTO_TFM_REQ_WEAK_KEY);
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key = aead_tv[i].key;
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ret = crypto_aead_setkey(tfm, key, aead_tv[i].klen);
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if (ret) {
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printk(KERN_INFO "setkey() failed flags=%x\n",
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crypto_aead_get_flags(tfm));
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if (!aead_tv[i].fail)
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goto out;
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}
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sg_init_table(sg, aead_tv[i].np);
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for (k = 0, temp = 0; k < aead_tv[i].np; k++) {
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memcpy(&xbuf[IDX[k]],
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aead_tv[i].input + temp,
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aead_tv[i].tap[k]);
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temp += aead_tv[i].tap[k];
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sg_set_buf(&sg[k], &xbuf[IDX[k]],
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aead_tv[i].tap[k]);
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}
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sg_init_table(asg, aead_tv[i].anp);
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for (k = 0, temp = 0; k < aead_tv[i].anp; k++) {
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memcpy(&axbuf[IDX[k]],
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aead_tv[i].assoc + temp,
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aead_tv[i].atap[k]);
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temp += aead_tv[i].atap[k];
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sg_set_buf(&asg[k], &axbuf[IDX[k]],
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aead_tv[i].atap[k]);
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}
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aead_request_set_crypt(req, sg, sg,
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aead_tv[i].ilen,
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aead_tv[i].iv);
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aead_request_set_assoc(req, asg, aead_tv[i].alen);
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if (enc) {
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ret = crypto_aead_encrypt(req);
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} else {
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memcpy(req->__ctx, aead_tv[i].tag,
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aead_tv[i].tlen);
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ret = crypto_aead_decrypt(req);
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}
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switch (ret) {
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case 0:
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break;
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case -EINPROGRESS:
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case -EBUSY:
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ret = wait_for_completion_interruptible(
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&result.completion);
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if (!ret && !(ret = result.err)) {
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INIT_COMPLETION(result.completion);
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break;
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}
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/* fall through */
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default:
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printk(KERN_INFO "%s () failed err=%d\n",
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e, -ret);
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goto out;
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}
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for (k = 0, temp = 0; k < aead_tv[i].np; k++) {
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printk(KERN_INFO "page %u\n", k);
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q = kmap(sg_page(&sg[k])) + sg[k].offset;
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hexdump(q, aead_tv[i].tap[k]);
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printk(KERN_INFO "%s\n",
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memcmp(q, aead_tv[i].result + temp,
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aead_tv[i].tap[k]) ?
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"fail" : "pass");
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temp += aead_tv[i].tap[k];
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}
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printk(KERN_INFO "auth tag: ");
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hexdump((unsigned char *)req->__ctx, aead_tv[i].tlen);
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printk(KERN_INFO "auth tag: %s\n",
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memcmp(req->__ctx, aead_tv[i].tag,
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aead_tv[i].tlen) ? "fail" : "pass");
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}
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}
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out:
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crypto_free_aead(tfm);
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aead_request_free(req);
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}
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static void test_cipher(char *algo, int enc,
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struct cipher_testvec *template, unsigned int tcount)
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{
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@ -1497,28 +1728,37 @@ static void do_test(void)
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static int __init init(void)
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{
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int err = -ENOMEM;
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tvmem = kmalloc(TVMEMSIZE, GFP_KERNEL);
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if (tvmem == NULL)
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return -ENOMEM;
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return err;
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xbuf = kmalloc(XBUFSIZE, GFP_KERNEL);
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if (xbuf == NULL) {
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kfree(tvmem);
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return -ENOMEM;
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}
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if (xbuf == NULL)
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goto err_free_tv;
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axbuf = kmalloc(XBUFSIZE, GFP_KERNEL);
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if (axbuf == NULL)
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goto err_free_xbuf;
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do_test();
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kfree(xbuf);
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kfree(tvmem);
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/* We intentionaly return -EAGAIN to prevent keeping
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* the module. It does all its work from init()
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* and doesn't offer any runtime functionality
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* => we don't need it in the memory, do we?
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* -- mludvig
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*/
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return -EAGAIN;
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err = -EAGAIN;
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kfree(axbuf);
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err_free_xbuf:
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kfree(xbuf);
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err_free_tv:
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kfree(tvmem);
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return err;
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}
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/*
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@ -6,12 +6,14 @@
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*
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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* Copyright (c) 2002 Jean-Francois Dive <jef@linuxbe.org>
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* Copyright (c) 2007 Nokia Siemens Networks
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* 2007-11-13 Added AEAD support
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* 2006-12-07 Added SHA384 HMAC and SHA512 HMAC tests
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* 2004-08-09 Cipher speed tests by Reyk Floeter <reyk@vantronix.net>
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* 2003-09-14 Changes by Kartikey Mahendra Bhatt
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@ -51,6 +53,26 @@ struct cipher_testvec {
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unsigned short rlen;
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};
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struct aead_testvec {
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char key[MAX_KEYLEN] __attribute__ ((__aligned__(4)));
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char iv[MAX_IVLEN];
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char input[512];
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char assoc[512];
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char result[512];
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char tag[128];
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unsigned char tap[MAX_TAP];
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unsigned char atap[MAX_TAP];
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int np;
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int anp;
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unsigned char fail;
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unsigned char wk; /* weak key flag */
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unsigned char klen;
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unsigned short ilen;
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unsigned short alen;
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unsigned short rlen;
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unsigned short tlen;
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};
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struct cipher_speed {
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unsigned char klen;
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unsigned int blen;
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